Question

State your observations on each of the following reactions.

When dilute Hydrochloric acid ($\mathbf{HCl}$) is added to Sodium carbonate crystals (${\mathbf{Na}}_{\mathbf{2}}{\mathbf{CO}}_{\mathbf{3}}$).

Answer 1

• Dilute Hydrochloric acid and Sodium carbonate reacts together to form Sodium chloride, water, and Carbon dioxide.
• This is a neutralization reaction and proceeds with brisk effervescence.
• The reaction happening here can be represented by the following chemical equation, $$\begin{gathered} {\mathrm{Na}}_2{\mathrm{CO}}_3\left(s\right)+2\mathrm{HCl}(dil.)\to 2\mathrm{NaCl}\left(aq\right)+{\mathrm{H}}_2\mathrm{O}\left(l\right)+{\mathrm{CO}}_2\left(g\right) \\ \mathrm{Sodium}\mathrm{Hydrochloric}\mathrm{Sodium}\mathrm{Water}\mathrm{Carbon} \\ \mathrm{carbonate}\mathrm{acid}\mathrm{chloride}\mathrm{dioxide} \end{gathered}$$
• Therefore, on reacting dilute Hydrochloric acid and Sodium carbonate, brisk effervescence is observed due to liberation of Carbon dioxide.